OREM, Utah. — Authorities on Friday announced the arrest of a 22-year-old Utah man on suspicion of killing conservative activist Charlie Kirk during a Wednesday event at Utah Valley University.

Tyler Robinson was taken into custody Thursday night, and investigators said they believe he acted alone.

Mr. Kirk, the CEO and co-founder of the conservative youth organization Turning Point USA, was a top podcaster and ally of President Donald Trump. He led an effort to remake the Republican Party’s get-out-the-vote effort in the 2024 election.

Here are moments leading up to Mr. Kirk’s event, his death and Mr. Robinson's arrest. All times are local.

Aug. 29

Ahead of Mr. Kirk's visit to Utah Valley University, a change.org petition is started titled “Prevent Charlie Kirk from speaking at Utah

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